Natalie Portman rocks but ‘Vox Lux’ lacks insight into stardom

Natalie Portman rocks but ‘Vox Lux’ lacks insight into stardom
Natalie Portman is captivating as a damaged electro-pop star known as Celeste in “Vox Lux,” a flawed, flashy drama from actor/director Brady Corbet (“The Childhood of a Leader”). But she doesn’t appear until nearly an hour into the film, which begins with a prologue on her origins (she’s initially played by Raffey Cassidy, who doubles...